/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=BIGGEST -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/locks/test_locks_6.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 17:53:43,871 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 17:53:43,874 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 17:53:43,897 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 17:53:43,897 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 17:53:43,898 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 17:53:43,899 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 17:53:43,901 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 17:53:43,903 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 17:53:43,903 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 17:53:43,904 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 17:53:43,905 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 17:53:43,906 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 17:53:43,907 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 17:53:43,908 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 17:53:43,909 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 17:53:43,909 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 17:53:43,910 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 17:53:43,912 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 17:53:43,913 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 17:53:43,915 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 17:53:43,916 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 17:53:43,917 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 17:53:43,917 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 17:53:43,921 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-18 17:53:43,929 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 17:53:43,929 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 17:53:43,930 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 17:53:43,931 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-18 17:53:43,953 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 17:53:43,953 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 17:53:43,954 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 17:53:43,955 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 17:53:43,955 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 17:53:43,955 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 17:53:43,955 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 17:53:43,955 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 17:53:43,956 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 17:53:43,956 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 17:53:43,956 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 17:53:43,956 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 17:53:43,956 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 17:53:43,957 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 17:53:43,957 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 17:53:43,957 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 17:53:43,957 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 17:53:43,957 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 17:53:43,957 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 17:53:43,958 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 17:53:43,958 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 17:53:43,958 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 17:53:43,958 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 17:53:43,958 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 17:53:43,959 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 17:53:43,959 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 17:53:43,959 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 17:53:43,959 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 17:53:43,959 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 17:53:43,960 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=BIGGEST; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=BIGGEST; [2020-08-18 17:53:44,235 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 17:53:44,255 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 17:53:44,260 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 17:53:44,263 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 17:53:44,264 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 17:53:44,265 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_6.c [2020-08-18 17:53:44,328 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5f4e7b255/9935ff71355045f5a9ac5f7d505751af/FLAGa21049e44 [2020-08-18 17:53:44,813 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 17:53:44,814 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/locks/test_locks_6.c [2020-08-18 17:53:44,823 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5f4e7b255/9935ff71355045f5a9ac5f7d505751af/FLAGa21049e44 [2020-08-18 17:53:45,203 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5f4e7b255/9935ff71355045f5a9ac5f7d505751af [2020-08-18 17:53:45,212 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 17:53:45,214 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 17:53:45,215 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 17:53:45,215 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 17:53:45,219 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 17:53:45,220 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 05:53:45" (1/1) ... [2020-08-18 17:53:45,223 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@34b0c8ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:53:45, skipping insertion in model container [2020-08-18 17:53:45,223 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 05:53:45" (1/1) ... [2020-08-18 17:53:45,231 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 17:53:45,254 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 17:53:45,420 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 17:53:45,424 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 17:53:45,445 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 17:53:45,458 INFO L208 MainTranslator]: Completed translation [2020-08-18 17:53:45,459 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:53:45 WrapperNode [2020-08-18 17:53:45,459 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 17:53:45,460 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 17:53:45,460 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 17:53:45,460 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 17:53:45,543 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:53:45" (1/1) ... [2020-08-18 17:53:45,544 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:53:45" (1/1) ... [2020-08-18 17:53:45,556 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:53:45" (1/1) ... [2020-08-18 17:53:45,556 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:53:45" (1/1) ... [2020-08-18 17:53:45,560 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:53:45" (1/1) ... [2020-08-18 17:53:45,571 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:53:45" (1/1) ... [2020-08-18 17:53:45,572 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:53:45" (1/1) ... [2020-08-18 17:53:45,574 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 17:53:45,574 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 17:53:45,575 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 17:53:45,575 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 17:53:45,576 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:53:45" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 17:53:45,637 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 17:53:45,638 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 17:53:45,638 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 17:53:45,638 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 17:53:45,639 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 17:53:45,640 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 17:53:45,640 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 17:53:45,641 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 17:53:45,879 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 17:53:45,879 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-18 17:53:45,883 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 05:53:45 BoogieIcfgContainer [2020-08-18 17:53:45,883 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 17:53:45,884 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 17:53:45,885 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 17:53:45,888 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 17:53:45,889 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 05:53:45" (1/3) ... [2020-08-18 17:53:45,889 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65d82299 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 05:53:45, skipping insertion in model container [2020-08-18 17:53:45,889 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:53:45" (2/3) ... [2020-08-18 17:53:45,890 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65d82299 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 05:53:45, skipping insertion in model container [2020-08-18 17:53:45,890 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 05:53:45" (3/3) ... [2020-08-18 17:53:45,892 INFO L109 eAbstractionObserver]: Analyzing ICFG test_locks_6.c [2020-08-18 17:53:45,902 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 17:53:45,909 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 17:53:45,924 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 17:53:45,977 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 17:53:45,977 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 17:53:45,978 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 17:53:45,978 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 17:53:45,978 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 17:53:45,978 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 17:53:45,981 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 17:53:45,981 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 17:53:46,034 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2020-08-18 17:53:46,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-08-18 17:53:46,044 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:53:46,047 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:53:46,047 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:53:46,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:53:46,054 INFO L82 PathProgramCache]: Analyzing trace with hash 429652513, now seen corresponding path program 1 times [2020-08-18 17:53:46,061 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:53:46,061 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1355836136] [2020-08-18 17:53:46,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:53:46,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:46,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:53:46,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:46,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:53:46,230 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1355836136] [2020-08-18 17:53:46,232 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:53:46,233 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 17:53:46,234 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419429220] [2020-08-18 17:53:46,239 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 17:53:46,240 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:53:46,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 17:53:46,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:53:46,258 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 3 states. [2020-08-18 17:53:46,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:53:46,319 INFO L93 Difference]: Finished difference Result 63 states and 102 transitions. [2020-08-18 17:53:46,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 17:53:46,321 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-08-18 17:53:46,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:53:46,335 INFO L225 Difference]: With dead ends: 63 [2020-08-18 17:53:46,335 INFO L226 Difference]: Without dead ends: 48 [2020-08-18 17:53:46,339 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:53:46,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-08-18 17:53:46,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 34. [2020-08-18 17:53:46,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-08-18 17:53:46,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 57 transitions. [2020-08-18 17:53:46,386 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 57 transitions. Word has length 16 [2020-08-18 17:53:46,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:53:46,387 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 57 transitions. [2020-08-18 17:53:46,387 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 17:53:46,387 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 57 transitions. [2020-08-18 17:53:46,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-08-18 17:53:46,389 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:53:46,389 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:53:46,389 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 17:53:46,390 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:53:46,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:53:46,390 INFO L82 PathProgramCache]: Analyzing trace with hash 1109710883, now seen corresponding path program 1 times [2020-08-18 17:53:46,391 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:53:46,391 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [792413549] [2020-08-18 17:53:46,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:53:46,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:46,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:53:46,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:46,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:53:46,452 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [792413549] [2020-08-18 17:53:46,453 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:53:46,456 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 17:53:46,456 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734896895] [2020-08-18 17:53:46,459 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 17:53:46,460 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:53:46,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 17:53:46,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:53:46,461 INFO L87 Difference]: Start difference. First operand 34 states and 57 transitions. Second operand 3 states. [2020-08-18 17:53:46,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:53:46,503 INFO L93 Difference]: Finished difference Result 77 states and 132 transitions. [2020-08-18 17:53:46,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 17:53:46,504 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-08-18 17:53:46,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:53:46,506 INFO L225 Difference]: With dead ends: 77 [2020-08-18 17:53:46,506 INFO L226 Difference]: Without dead ends: 48 [2020-08-18 17:53:46,508 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:53:46,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-08-18 17:53:46,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2020-08-18 17:53:46,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-08-18 17:53:46,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 77 transitions. [2020-08-18 17:53:46,517 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 77 transitions. Word has length 16 [2020-08-18 17:53:46,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:53:46,517 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 77 transitions. [2020-08-18 17:53:46,517 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 17:53:46,522 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 77 transitions. [2020-08-18 17:53:46,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-08-18 17:53:46,523 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:53:46,523 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:53:46,523 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 17:53:46,523 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:53:46,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:53:46,527 INFO L82 PathProgramCache]: Analyzing trace with hash 434540691, now seen corresponding path program 1 times [2020-08-18 17:53:46,527 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:53:46,528 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [781231634] [2020-08-18 17:53:46,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:53:46,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:46,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:53:46,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:46,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:53:46,594 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [781231634] [2020-08-18 17:53:46,594 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:53:46,594 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 17:53:46,595 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944109917] [2020-08-18 17:53:46,595 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 17:53:46,596 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:53:46,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 17:53:46,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:53:46,596 INFO L87 Difference]: Start difference. First operand 46 states and 77 transitions. Second operand 3 states. [2020-08-18 17:53:46,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:53:46,617 INFO L93 Difference]: Finished difference Result 72 states and 117 transitions. [2020-08-18 17:53:46,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 17:53:46,617 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-08-18 17:53:46,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:53:46,619 INFO L225 Difference]: With dead ends: 72 [2020-08-18 17:53:46,619 INFO L226 Difference]: Without dead ends: 51 [2020-08-18 17:53:46,620 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:53:46,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-08-18 17:53:46,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 49. [2020-08-18 17:53:46,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-08-18 17:53:46,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 79 transitions. [2020-08-18 17:53:46,629 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 79 transitions. Word has length 17 [2020-08-18 17:53:46,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:53:46,629 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 79 transitions. [2020-08-18 17:53:46,629 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 17:53:46,630 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 79 transitions. [2020-08-18 17:53:46,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-08-18 17:53:46,631 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:53:46,631 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:53:46,631 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 17:53:46,631 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:53:46,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:53:46,632 INFO L82 PathProgramCache]: Analyzing trace with hash 41513681, now seen corresponding path program 1 times [2020-08-18 17:53:46,632 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:53:46,633 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2083422230] [2020-08-18 17:53:46,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:53:46,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:46,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:53:46,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:46,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:53:46,692 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2083422230] [2020-08-18 17:53:46,692 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:53:46,692 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 17:53:46,693 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175185879] [2020-08-18 17:53:46,693 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 17:53:46,694 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:53:46,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 17:53:46,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:53:46,694 INFO L87 Difference]: Start difference. First operand 49 states and 79 transitions. Second operand 3 states. [2020-08-18 17:53:46,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:53:46,716 INFO L93 Difference]: Finished difference Result 88 states and 144 transitions. [2020-08-18 17:53:46,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 17:53:46,717 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-08-18 17:53:46,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:53:46,718 INFO L225 Difference]: With dead ends: 88 [2020-08-18 17:53:46,718 INFO L226 Difference]: Without dead ends: 86 [2020-08-18 17:53:46,719 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:53:46,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-08-18 17:53:46,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 64. [2020-08-18 17:53:46,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-08-18 17:53:46,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 104 transitions. [2020-08-18 17:53:46,731 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 104 transitions. Word has length 17 [2020-08-18 17:53:46,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:53:46,731 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 104 transitions. [2020-08-18 17:53:46,731 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 17:53:46,731 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 104 transitions. [2020-08-18 17:53:46,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-08-18 17:53:46,734 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:53:46,735 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:53:46,735 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 17:53:46,735 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:53:46,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:53:46,735 INFO L82 PathProgramCache]: Analyzing trace with hash 721572051, now seen corresponding path program 1 times [2020-08-18 17:53:46,736 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:53:46,736 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1888019700] [2020-08-18 17:53:46,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:53:46,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:46,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:53:46,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:46,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:53:46,794 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1888019700] [2020-08-18 17:53:46,794 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:53:46,794 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 17:53:46,794 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431758365] [2020-08-18 17:53:46,795 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 17:53:46,795 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:53:46,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 17:53:46,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:53:46,796 INFO L87 Difference]: Start difference. First operand 64 states and 104 transitions. Second operand 3 states. [2020-08-18 17:53:46,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:53:46,821 INFO L93 Difference]: Finished difference Result 144 states and 238 transitions. [2020-08-18 17:53:46,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 17:53:46,822 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-08-18 17:53:46,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:53:46,823 INFO L225 Difference]: With dead ends: 144 [2020-08-18 17:53:46,823 INFO L226 Difference]: Without dead ends: 88 [2020-08-18 17:53:46,824 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:53:46,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-08-18 17:53:46,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 86. [2020-08-18 17:53:46,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-08-18 17:53:46,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 138 transitions. [2020-08-18 17:53:46,835 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 138 transitions. Word has length 17 [2020-08-18 17:53:46,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:53:46,836 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 138 transitions. [2020-08-18 17:53:46,836 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 17:53:46,836 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 138 transitions. [2020-08-18 17:53:46,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-18 17:53:46,837 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:53:46,837 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:53:46,838 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 17:53:46,838 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:53:46,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:53:46,838 INFO L82 PathProgramCache]: Analyzing trace with hash 1287139128, now seen corresponding path program 1 times [2020-08-18 17:53:46,839 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:53:46,839 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1309808281] [2020-08-18 17:53:46,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:53:46,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:46,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:53:46,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:46,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:53:46,875 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1309808281] [2020-08-18 17:53:46,875 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:53:46,875 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 17:53:46,876 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197643849] [2020-08-18 17:53:46,876 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 17:53:46,876 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:53:46,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 17:53:46,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:53:46,877 INFO L87 Difference]: Start difference. First operand 86 states and 138 transitions. Second operand 3 states. [2020-08-18 17:53:46,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:53:46,906 INFO L93 Difference]: Finished difference Result 129 states and 205 transitions. [2020-08-18 17:53:46,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 17:53:46,907 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-08-18 17:53:46,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:53:46,908 INFO L225 Difference]: With dead ends: 129 [2020-08-18 17:53:46,909 INFO L226 Difference]: Without dead ends: 90 [2020-08-18 17:53:46,909 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:53:46,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-08-18 17:53:46,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 88. [2020-08-18 17:53:46,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-08-18 17:53:46,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 138 transitions. [2020-08-18 17:53:46,924 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 138 transitions. Word has length 18 [2020-08-18 17:53:46,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:53:46,924 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 138 transitions. [2020-08-18 17:53:46,925 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 17:53:46,925 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 138 transitions. [2020-08-18 17:53:46,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-18 17:53:46,926 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:53:46,927 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:53:46,927 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 17:53:46,928 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:53:46,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:53:46,928 INFO L82 PathProgramCache]: Analyzing trace with hash 894112118, now seen corresponding path program 1 times [2020-08-18 17:53:46,928 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:53:46,929 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [13516869] [2020-08-18 17:53:46,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:53:46,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:46,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:53:46,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:46,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:53:46,983 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [13516869] [2020-08-18 17:53:46,983 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:53:46,984 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 17:53:46,984 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735491471] [2020-08-18 17:53:46,984 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 17:53:46,985 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:53:46,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 17:53:46,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:53:46,986 INFO L87 Difference]: Start difference. First operand 88 states and 138 transitions. Second operand 3 states. [2020-08-18 17:53:47,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:53:47,007 INFO L93 Difference]: Finished difference Result 156 states and 248 transitions. [2020-08-18 17:53:47,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 17:53:47,007 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-08-18 17:53:47,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:53:47,009 INFO L225 Difference]: With dead ends: 156 [2020-08-18 17:53:47,009 INFO L226 Difference]: Without dead ends: 154 [2020-08-18 17:53:47,010 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:53:47,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-08-18 17:53:47,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 120. [2020-08-18 17:53:47,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-08-18 17:53:47,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 186 transitions. [2020-08-18 17:53:47,030 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 186 transitions. Word has length 18 [2020-08-18 17:53:47,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:53:47,030 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 186 transitions. [2020-08-18 17:53:47,030 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 17:53:47,030 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 186 transitions. [2020-08-18 17:53:47,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-18 17:53:47,032 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:53:47,032 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:53:47,032 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 17:53:47,032 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:53:47,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:53:47,036 INFO L82 PathProgramCache]: Analyzing trace with hash 1574170488, now seen corresponding path program 1 times [2020-08-18 17:53:47,036 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:53:47,036 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1291399921] [2020-08-18 17:53:47,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:53:47,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:47,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:53:47,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:47,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:53:47,113 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1291399921] [2020-08-18 17:53:47,113 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:53:47,115 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 17:53:47,116 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368185192] [2020-08-18 17:53:47,116 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 17:53:47,117 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:53:47,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 17:53:47,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:53:47,117 INFO L87 Difference]: Start difference. First operand 120 states and 186 transitions. Second operand 3 states. [2020-08-18 17:53:47,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:53:47,146 INFO L93 Difference]: Finished difference Result 272 states and 424 transitions. [2020-08-18 17:53:47,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 17:53:47,146 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-08-18 17:53:47,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:53:47,148 INFO L225 Difference]: With dead ends: 272 [2020-08-18 17:53:47,148 INFO L226 Difference]: Without dead ends: 162 [2020-08-18 17:53:47,150 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:53:47,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-08-18 17:53:47,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 160. [2020-08-18 17:53:47,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-08-18 17:53:47,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 242 transitions. [2020-08-18 17:53:47,175 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 242 transitions. Word has length 18 [2020-08-18 17:53:47,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:53:47,175 INFO L479 AbstractCegarLoop]: Abstraction has 160 states and 242 transitions. [2020-08-18 17:53:47,175 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 17:53:47,176 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 242 transitions. [2020-08-18 17:53:47,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-18 17:53:47,177 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:53:47,177 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:53:47,177 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-18 17:53:47,177 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:53:47,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:53:47,178 INFO L82 PathProgramCache]: Analyzing trace with hash 1947887240, now seen corresponding path program 1 times [2020-08-18 17:53:47,178 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:53:47,179 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [455490182] [2020-08-18 17:53:47,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:53:47,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:47,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:53:47,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:47,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:53:47,206 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [455490182] [2020-08-18 17:53:47,206 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:53:47,206 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 17:53:47,207 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932262407] [2020-08-18 17:53:47,207 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 17:53:47,207 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:53:47,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 17:53:47,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:53:47,208 INFO L87 Difference]: Start difference. First operand 160 states and 242 transitions. Second operand 3 states. [2020-08-18 17:53:47,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:53:47,231 INFO L93 Difference]: Finished difference Result 240 states and 360 transitions. [2020-08-18 17:53:47,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 17:53:47,231 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-18 17:53:47,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:53:47,233 INFO L225 Difference]: With dead ends: 240 [2020-08-18 17:53:47,233 INFO L226 Difference]: Without dead ends: 166 [2020-08-18 17:53:47,234 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:53:47,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-08-18 17:53:47,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 164. [2020-08-18 17:53:47,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-08-18 17:53:47,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 242 transitions. [2020-08-18 17:53:47,245 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 242 transitions. Word has length 19 [2020-08-18 17:53:47,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:53:47,246 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 242 transitions. [2020-08-18 17:53:47,246 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 17:53:47,246 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 242 transitions. [2020-08-18 17:53:47,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-18 17:53:47,248 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:53:47,248 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:53:47,248 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-18 17:53:47,248 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:53:47,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:53:47,249 INFO L82 PathProgramCache]: Analyzing trace with hash 1554860230, now seen corresponding path program 1 times [2020-08-18 17:53:47,252 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:53:47,252 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [962892133] [2020-08-18 17:53:47,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:53:47,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:47,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:53:47,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:47,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:53:47,276 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [962892133] [2020-08-18 17:53:47,276 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:53:47,276 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 17:53:47,276 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233384236] [2020-08-18 17:53:47,277 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 17:53:47,277 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:53:47,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 17:53:47,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:53:47,278 INFO L87 Difference]: Start difference. First operand 164 states and 242 transitions. Second operand 3 states. [2020-08-18 17:53:47,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:53:47,312 INFO L93 Difference]: Finished difference Result 284 states and 424 transitions. [2020-08-18 17:53:47,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 17:53:47,314 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-18 17:53:47,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:53:47,316 INFO L225 Difference]: With dead ends: 284 [2020-08-18 17:53:47,316 INFO L226 Difference]: Without dead ends: 282 [2020-08-18 17:53:47,317 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:53:47,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2020-08-18 17:53:47,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 232. [2020-08-18 17:53:47,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2020-08-18 17:53:47,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 334 transitions. [2020-08-18 17:53:47,339 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 334 transitions. Word has length 19 [2020-08-18 17:53:47,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:53:47,339 INFO L479 AbstractCegarLoop]: Abstraction has 232 states and 334 transitions. [2020-08-18 17:53:47,339 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 17:53:47,339 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 334 transitions. [2020-08-18 17:53:47,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-18 17:53:47,345 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:53:47,345 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:53:47,346 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-18 17:53:47,346 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:53:47,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:53:47,346 INFO L82 PathProgramCache]: Analyzing trace with hash -2060048696, now seen corresponding path program 1 times [2020-08-18 17:53:47,346 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:53:47,349 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [657165329] [2020-08-18 17:53:47,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:53:47,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:47,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:53:47,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:47,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:53:47,388 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [657165329] [2020-08-18 17:53:47,388 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:53:47,388 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 17:53:47,388 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537354618] [2020-08-18 17:53:47,389 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 17:53:47,389 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:53:47,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 17:53:47,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:53:47,390 INFO L87 Difference]: Start difference. First operand 232 states and 334 transitions. Second operand 3 states. [2020-08-18 17:53:47,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:53:47,417 INFO L93 Difference]: Finished difference Result 524 states and 752 transitions. [2020-08-18 17:53:47,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 17:53:47,418 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-18 17:53:47,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:53:47,420 INFO L225 Difference]: With dead ends: 524 [2020-08-18 17:53:47,420 INFO L226 Difference]: Without dead ends: 306 [2020-08-18 17:53:47,422 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:53:47,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2020-08-18 17:53:47,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 304. [2020-08-18 17:53:47,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 304 states. [2020-08-18 17:53:47,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 422 transitions. [2020-08-18 17:53:47,437 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 422 transitions. Word has length 19 [2020-08-18 17:53:47,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:53:47,437 INFO L479 AbstractCegarLoop]: Abstraction has 304 states and 422 transitions. [2020-08-18 17:53:47,437 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 17:53:47,437 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 422 transitions. [2020-08-18 17:53:47,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-18 17:53:47,439 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:53:47,439 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:53:47,439 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-18 17:53:47,439 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:53:47,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:53:47,440 INFO L82 PathProgramCache]: Analyzing trace with hash 956242573, now seen corresponding path program 1 times [2020-08-18 17:53:47,440 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:53:47,440 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1780440288] [2020-08-18 17:53:47,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:53:47,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:47,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:53:47,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:47,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:53:47,463 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1780440288] [2020-08-18 17:53:47,463 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:53:47,463 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 17:53:47,463 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901390050] [2020-08-18 17:53:47,464 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 17:53:47,464 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:53:47,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 17:53:47,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:53:47,465 INFO L87 Difference]: Start difference. First operand 304 states and 422 transitions. Second operand 3 states. [2020-08-18 17:53:47,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:53:47,485 INFO L93 Difference]: Finished difference Result 456 states and 628 transitions. [2020-08-18 17:53:47,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 17:53:47,485 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-18 17:53:47,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:53:47,488 INFO L225 Difference]: With dead ends: 456 [2020-08-18 17:53:47,488 INFO L226 Difference]: Without dead ends: 314 [2020-08-18 17:53:47,489 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:53:47,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2020-08-18 17:53:47,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 312. [2020-08-18 17:53:47,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 312 states. [2020-08-18 17:53:47,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 422 transitions. [2020-08-18 17:53:47,503 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 422 transitions. Word has length 20 [2020-08-18 17:53:47,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:53:47,503 INFO L479 AbstractCegarLoop]: Abstraction has 312 states and 422 transitions. [2020-08-18 17:53:47,503 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 17:53:47,504 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 422 transitions. [2020-08-18 17:53:47,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-18 17:53:47,505 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:53:47,505 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:53:47,505 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-18 17:53:47,506 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:53:47,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:53:47,506 INFO L82 PathProgramCache]: Analyzing trace with hash 563215563, now seen corresponding path program 1 times [2020-08-18 17:53:47,506 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:53:47,506 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [563438772] [2020-08-18 17:53:47,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:53:47,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:47,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:53:47,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:47,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:53:47,528 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [563438772] [2020-08-18 17:53:47,529 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:53:47,529 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 17:53:47,529 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080486633] [2020-08-18 17:53:47,529 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 17:53:47,530 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:53:47,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 17:53:47,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:53:47,530 INFO L87 Difference]: Start difference. First operand 312 states and 422 transitions. Second operand 3 states. [2020-08-18 17:53:47,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:53:47,556 INFO L93 Difference]: Finished difference Result 524 states and 712 transitions. [2020-08-18 17:53:47,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 17:53:47,557 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-18 17:53:47,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:53:47,560 INFO L225 Difference]: With dead ends: 524 [2020-08-18 17:53:47,560 INFO L226 Difference]: Without dead ends: 522 [2020-08-18 17:53:47,561 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:53:47,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 522 states. [2020-08-18 17:53:47,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 522 to 456. [2020-08-18 17:53:47,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 456 states. [2020-08-18 17:53:47,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 598 transitions. [2020-08-18 17:53:47,578 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 598 transitions. Word has length 20 [2020-08-18 17:53:47,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:53:47,578 INFO L479 AbstractCegarLoop]: Abstraction has 456 states and 598 transitions. [2020-08-18 17:53:47,578 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 17:53:47,578 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 598 transitions. [2020-08-18 17:53:47,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-18 17:53:47,580 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:53:47,580 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:53:47,580 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-18 17:53:47,580 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:53:47,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:53:47,581 INFO L82 PathProgramCache]: Analyzing trace with hash 1243273933, now seen corresponding path program 1 times [2020-08-18 17:53:47,581 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:53:47,581 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1900369810] [2020-08-18 17:53:47,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:53:47,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:47,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:53:47,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:47,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:53:47,600 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1900369810] [2020-08-18 17:53:47,601 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:53:47,601 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 17:53:47,601 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989709221] [2020-08-18 17:53:47,601 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 17:53:47,602 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:53:47,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 17:53:47,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:53:47,602 INFO L87 Difference]: Start difference. First operand 456 states and 598 transitions. Second operand 3 states. [2020-08-18 17:53:47,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:53:47,629 INFO L93 Difference]: Finished difference Result 1020 states and 1320 transitions. [2020-08-18 17:53:47,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 17:53:47,630 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-18 17:53:47,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:53:47,633 INFO L225 Difference]: With dead ends: 1020 [2020-08-18 17:53:47,633 INFO L226 Difference]: Without dead ends: 586 [2020-08-18 17:53:47,635 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:53:47,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2020-08-18 17:53:47,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 584. [2020-08-18 17:53:47,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 584 states. [2020-08-18 17:53:47,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 584 states to 584 states and 726 transitions. [2020-08-18 17:53:47,658 INFO L78 Accepts]: Start accepts. Automaton has 584 states and 726 transitions. Word has length 20 [2020-08-18 17:53:47,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:53:47,658 INFO L479 AbstractCegarLoop]: Abstraction has 584 states and 726 transitions. [2020-08-18 17:53:47,658 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 17:53:47,659 INFO L276 IsEmpty]: Start isEmpty. Operand 584 states and 726 transitions. [2020-08-18 17:53:47,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-18 17:53:47,661 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:53:47,661 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:53:47,661 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-18 17:53:47,662 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:53:47,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:53:47,662 INFO L82 PathProgramCache]: Analyzing trace with hash 280029309, now seen corresponding path program 1 times [2020-08-18 17:53:47,663 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:53:47,663 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [683102942] [2020-08-18 17:53:47,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:53:47,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:47,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:53:47,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:47,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:53:47,690 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [683102942] [2020-08-18 17:53:47,690 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:53:47,690 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 17:53:47,691 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779128509] [2020-08-18 17:53:47,691 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 17:53:47,691 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:53:47,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 17:53:47,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:53:47,692 INFO L87 Difference]: Start difference. First operand 584 states and 726 transitions. Second operand 3 states. [2020-08-18 17:53:47,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:53:47,715 INFO L93 Difference]: Finished difference Result 876 states and 1080 transitions. [2020-08-18 17:53:47,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 17:53:47,716 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-18 17:53:47,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:53:47,719 INFO L225 Difference]: With dead ends: 876 [2020-08-18 17:53:47,719 INFO L226 Difference]: Without dead ends: 602 [2020-08-18 17:53:47,720 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:53:47,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 602 states. [2020-08-18 17:53:47,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 602 to 600. [2020-08-18 17:53:47,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 600 states. [2020-08-18 17:53:47,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 600 states to 600 states and 726 transitions. [2020-08-18 17:53:47,741 INFO L78 Accepts]: Start accepts. Automaton has 600 states and 726 transitions. Word has length 21 [2020-08-18 17:53:47,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:53:47,741 INFO L479 AbstractCegarLoop]: Abstraction has 600 states and 726 transitions. [2020-08-18 17:53:47,741 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 17:53:47,741 INFO L276 IsEmpty]: Start isEmpty. Operand 600 states and 726 transitions. [2020-08-18 17:53:47,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-18 17:53:47,743 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:53:47,743 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:53:47,743 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-18 17:53:47,743 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:53:47,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:53:47,744 INFO L82 PathProgramCache]: Analyzing trace with hash -112997701, now seen corresponding path program 1 times [2020-08-18 17:53:47,744 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:53:47,744 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [565009362] [2020-08-18 17:53:47,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:53:47,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:47,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:53:47,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:47,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:53:47,774 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [565009362] [2020-08-18 17:53:47,774 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:53:47,774 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 17:53:47,774 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723740463] [2020-08-18 17:53:47,775 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 17:53:47,775 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:53:47,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 17:53:47,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:53:47,776 INFO L87 Difference]: Start difference. First operand 600 states and 726 transitions. Second operand 3 states. [2020-08-18 17:53:47,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:53:47,809 INFO L93 Difference]: Finished difference Result 970 states and 1159 transitions. [2020-08-18 17:53:47,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 17:53:47,810 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-18 17:53:47,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:53:47,815 INFO L225 Difference]: With dead ends: 970 [2020-08-18 17:53:47,815 INFO L226 Difference]: Without dead ends: 968 [2020-08-18 17:53:47,816 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:53:47,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 968 states. [2020-08-18 17:53:47,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 968 to 904. [2020-08-18 17:53:47,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 904 states. [2020-08-18 17:53:47,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 904 states to 904 states and 1062 transitions. [2020-08-18 17:53:47,851 INFO L78 Accepts]: Start accepts. Automaton has 904 states and 1062 transitions. Word has length 21 [2020-08-18 17:53:47,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:53:47,852 INFO L479 AbstractCegarLoop]: Abstraction has 904 states and 1062 transitions. [2020-08-18 17:53:47,852 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 17:53:47,852 INFO L276 IsEmpty]: Start isEmpty. Operand 904 states and 1062 transitions. [2020-08-18 17:53:47,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-18 17:53:47,855 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:53:47,855 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:53:47,855 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-18 17:53:47,855 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:53:47,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:53:47,856 INFO L82 PathProgramCache]: Analyzing trace with hash 567060669, now seen corresponding path program 1 times [2020-08-18 17:53:47,856 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:53:47,856 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1763401179] [2020-08-18 17:53:47,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:53:47,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:47,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:53:47,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:47,877 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:53:47,877 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1763401179] [2020-08-18 17:53:47,877 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:53:47,877 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 17:53:47,878 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4413880] [2020-08-18 17:53:47,878 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 17:53:47,878 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:53:47,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 17:53:47,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:53:47,879 INFO L87 Difference]: Start difference. First operand 904 states and 1062 transitions. Second operand 3 states. [2020-08-18 17:53:47,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:53:47,922 INFO L93 Difference]: Finished difference Result 1992 states and 2278 transitions. [2020-08-18 17:53:47,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 17:53:47,923 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-18 17:53:47,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:53:47,923 INFO L225 Difference]: With dead ends: 1992 [2020-08-18 17:53:47,923 INFO L226 Difference]: Without dead ends: 0 [2020-08-18 17:53:47,927 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:53:47,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-18 17:53:47,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-18 17:53:47,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-18 17:53:47,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-18 17:53:47,928 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 21 [2020-08-18 17:53:47,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:53:47,929 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-18 17:53:47,929 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 17:53:47,929 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-18 17:53:47,929 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-18 17:53:47,929 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-18 17:53:47,932 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-18 17:53:47,966 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-18 17:53:47,966 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-18 17:53:47,966 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-18 17:53:47,967 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-18 17:53:47,967 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-18 17:53:47,967 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-18 17:53:47,967 INFO L268 CegarLoopResult]: For program point L93(line 93) no Hoare annotation was computed. [2020-08-18 17:53:47,967 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 4 107) no Hoare annotation was computed. [2020-08-18 17:53:47,967 INFO L268 CegarLoopResult]: For program point L77-1(lines 27 102) no Hoare annotation was computed. [2020-08-18 17:53:47,967 INFO L268 CegarLoopResult]: For program point L78(line 78) no Hoare annotation was computed. [2020-08-18 17:53:47,967 INFO L271 CegarLoopResult]: At program point L103(lines 5 107) the Hoare annotation is: true [2020-08-18 17:53:47,968 INFO L268 CegarLoopResult]: For program point L29(lines 29 31) no Hoare annotation was computed. [2020-08-18 17:53:47,968 INFO L268 CegarLoopResult]: For program point L62-1(lines 27 102) no Hoare annotation was computed. [2020-08-18 17:53:47,968 INFO L268 CegarLoopResult]: For program point L87-1(lines 27 102) no Hoare annotation was computed. [2020-08-18 17:53:47,968 INFO L268 CegarLoopResult]: For program point L54-1(lines 27 102) no Hoare annotation was computed. [2020-08-18 17:53:47,968 INFO L268 CegarLoopResult]: For program point L46(lines 46 48) no Hoare annotation was computed. [2020-08-18 17:53:47,968 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 4 107) no Hoare annotation was computed. [2020-08-18 17:53:47,968 INFO L268 CegarLoopResult]: For program point L46-2(lines 27 102) no Hoare annotation was computed. [2020-08-18 17:53:47,968 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 105) no Hoare annotation was computed. [2020-08-18 17:53:47,969 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 4 107) the Hoare annotation is: true [2020-08-18 17:53:47,969 INFO L268 CegarLoopResult]: For program point L88(line 88) no Hoare annotation was computed. [2020-08-18 17:53:47,969 INFO L268 CegarLoopResult]: For program point L72-1(lines 27 102) no Hoare annotation was computed. [2020-08-18 17:53:47,969 INFO L271 CegarLoopResult]: At program point L97-1(lines 27 102) the Hoare annotation is: true [2020-08-18 17:53:47,969 INFO L268 CegarLoopResult]: For program point L73(line 73) no Hoare annotation was computed. [2020-08-18 17:53:47,969 INFO L268 CegarLoopResult]: For program point L98(line 98) no Hoare annotation was computed. [2020-08-18 17:53:47,969 INFO L264 CegarLoopResult]: At program point L98-1(lines 5 107) the Hoare annotation is: false [2020-08-18 17:53:47,970 INFO L268 CegarLoopResult]: For program point L82-1(lines 27 102) no Hoare annotation was computed. [2020-08-18 17:53:47,970 INFO L268 CegarLoopResult]: For program point L66-1(lines 27 102) no Hoare annotation was computed. [2020-08-18 17:53:47,970 INFO L268 CegarLoopResult]: For program point L58-1(lines 27 102) no Hoare annotation was computed. [2020-08-18 17:53:47,970 INFO L268 CegarLoopResult]: For program point L83(line 83) no Hoare annotation was computed. [2020-08-18 17:53:47,970 INFO L268 CegarLoopResult]: For program point L50-1(lines 27 102) no Hoare annotation was computed. [2020-08-18 17:53:47,970 INFO L268 CegarLoopResult]: For program point L92-1(lines 27 102) no Hoare annotation was computed. [2020-08-18 17:53:47,983 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 05:53:47 BoogieIcfgContainer [2020-08-18 17:53:47,983 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 17:53:47,986 INFO L168 Benchmark]: Toolchain (without parser) took 2771.38 ms. Allocated memory was 139.5 MB in the beginning and 247.5 MB in the end (delta: 108.0 MB). Free memory was 102.2 MB in the beginning and 217.7 MB in the end (delta: -115.5 MB). Peak memory consumption was 116.5 MB. Max. memory is 7.1 GB. [2020-08-18 17:53:47,987 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-18 17:53:47,988 INFO L168 Benchmark]: CACSL2BoogieTranslator took 244.55 ms. Allocated memory is still 139.5 MB. Free memory was 102.0 MB in the beginning and 91.9 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. [2020-08-18 17:53:47,988 INFO L168 Benchmark]: Boogie Preprocessor took 114.21 ms. Allocated memory was 139.5 MB in the beginning and 201.9 MB in the end (delta: 62.4 MB). Free memory was 91.9 MB in the beginning and 179.8 MB in the end (delta: -87.9 MB). Peak memory consumption was 12.7 MB. Max. memory is 7.1 GB. [2020-08-18 17:53:47,989 INFO L168 Benchmark]: RCFGBuilder took 308.73 ms. Allocated memory is still 201.9 MB. Free memory was 179.8 MB in the beginning and 163.8 MB in the end (delta: 16.1 MB). Peak memory consumption was 16.1 MB. Max. memory is 7.1 GB. [2020-08-18 17:53:47,990 INFO L168 Benchmark]: TraceAbstraction took 2098.81 ms. Allocated memory was 201.9 MB in the beginning and 247.5 MB in the end (delta: 45.6 MB). Free memory was 163.1 MB in the beginning and 217.7 MB in the end (delta: -54.6 MB). Peak memory consumption was 115.1 MB. Max. memory is 7.1 GB. [2020-08-18 17:53:47,994 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 244.55 ms. Allocated memory is still 139.5 MB. Free memory was 102.0 MB in the beginning and 91.9 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 114.21 ms. Allocated memory was 139.5 MB in the beginning and 201.9 MB in the end (delta: 62.4 MB). Free memory was 91.9 MB in the beginning and 179.8 MB in the end (delta: -87.9 MB). Peak memory consumption was 12.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 308.73 ms. Allocated memory is still 201.9 MB. Free memory was 179.8 MB in the beginning and 163.8 MB in the end (delta: 16.1 MB). Peak memory consumption was 16.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2098.81 ms. Allocated memory was 201.9 MB in the beginning and 247.5 MB in the end (delta: 45.6 MB). Free memory was 163.1 MB in the beginning and 217.7 MB in the end (delta: -54.6 MB). Peak memory consumption was 115.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 105]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 27]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 32 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.9s, OverallIterations: 17, TraceHistogramMax: 1, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 923 SDtfs, 417 SDslu, 612 SDs, 0 SdLazy, 91 SolverSat, 17 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 85 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=904occurred in iteration=16, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 17 MinimizatonAttempts, 270 StatesRemovedByMinimization, 16 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 74 NumberOfFragments, 7 HoareAnnotationTreeSize, 7 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 317 NumberOfCodeBlocks, 317 NumberOfCodeBlocksAsserted, 17 NumberOfCheckSat, 300 ConstructedInterpolants, 0 QuantifiedInterpolants, 9690 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 17 InterpolantComputations, 17 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...